Astronomy:NGC 2939

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NGC 2939
NGC 2939 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationLeo (constellation)
Right ascension 09h 38m 08.0700s[1]
Declination+09° 31′ 17.500″[1]
Redshift0.011138±0.00000500[1]
Helio radial velocity3,339±1 km/s[1]
Distance149.30 ± 5.20 Mly (45.777 ± 1.594 Mpc)[2]
Group or clusterNGC 2911 group (LGG 177)
Apparent magnitude (V)13.15[1]
Characteristics
TypeSbc[1]
Size~112,900 ly (34.62 kpc) (estimated)[1]
Apparent size (V)2.6′ × 0.7′[1]
Other designations
IRAS 09354+0945, UGC 5134, MCG+04-23-018, PGC 27451[1]

NGC 2939 is a spiral galaxy in the constellation of Leo. Its velocity with respect to the cosmic microwave background is 3,665±23 km/s, which corresponds to a Hubble distance of 176.3 ± 12.4 Mly (54.05 ± 3.80 Mpc).[1] However, 13 non-redshift measurements give a closer mean distance of 149.30 ± 5.20 Mly (45.777 ± 1.594 Mpc).[2] It was discovered by German-British astronomer William Herschel on 18 January 1784.[3][4]

NGC 2939 is a radio galaxy, i.e. it has giant regions of radio emission extending well beyond its visible structure.[5][6]

NGC 2911 group

NGC 2939 is a member of the NGC 2911 group (also known as LGG 177). This group contains 7 galaxies, including NGC 2911, NGC 2913 (fr), NGC 2914 (fr), UGC 5189 (d), UGC 5216 (d), and PGC 27167.[7][8]

Supernovae

Two supernovae have been observed in NGC 2939:

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Results for object NGC 2939". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+2939. 
  2. ↑ 2.0 2.1 "Distance Results for NGC 2939". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+2939. 
  3. ↑ Herschel, William (1786). "Catalogue of One Thousand New Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London 76: 457–499. doi:10.1098/rstl.1786.0027. Bibcode: 1786RSPT...76..457H. https://zenodo.org/record/1432282/files/article.pdf. 
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 2939". https://cseligman.com/text/atlas/ngc29.htm#2939. 
  5. ↑ Best, P. N.; Heckman, T. M. (2012). "On the fundamental dichotomy in the local radio-AGN population: Accretion, evolution and host galaxy properties". Monthly Notices of the Royal Astronomical Society 421 (2): 1569. doi:10.1111/j.1365-2966.2012.20414.x. Bibcode: 2012MNRAS.421.1569B. 
  6. ↑ "NGC 2939". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2939. 
  7. ↑ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series 100: 47. Bibcode: 1993A&AS..100...47G. 
  8. ↑ "LGG 177". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LGG+177. 
  9. ↑ Pignata, G.; Maza, J.; Hamuy, M.; Antezana, R.; Gonzalez, L.; Gonzalez, P.; Lopez, P.; Silva, S. et al. (2009). "Supernova 2009ao in NGC 2939". Central Bureau Electronic Telegrams (1711): 1. Bibcode: 2009CBET.1711....1P. http://www.cbat.eps.harvard.edu/iau/cbet/001700/CBET001711.txt. 
  10. ↑ "SN 2009ao". IAU. https://www.wis-tns.org/object/2009ao. 
  11. ↑ Kandrashoff, M.; Lin, K.; Cenko, S. B.; Li, W.; Filippenko, A. V.; Silverman, J. M.; Canalizo, G.; Hiner, K. et al. (2011). "Supernova 2011cf in NGC 2939 = PSN J09380828+0931111". Central Bureau Electronic Telegrams (2716): 1. Bibcode: 2011CBET.2716....1K. http://www.cbat.eps.harvard.edu/iau/cbet/002700/CBET002716.txt. 
  12. ↑ "SN 2011cf". IAU. https://www.wis-tns.org/object/2011cf. 

Coordinates: Sky map 09h 38m 08.0700s, +09° 31′ 17.500″



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